Hi Gerard!
I've been using EOS 300 with EF50/1.8. I have only a few that are maybe 1/2 stop darker, and have some that are 1.5 stop darker. I thought that the metering system should compensate for the light loss automatically. You might have a point with 18% grey issue, I thought about that already. If think that 30/50 and 300 meters the same, as 300 has advanced 35 zone metering (as I think does the 30).... ? > -----Original Message----- > > For 20 mm ext. tube its. 2.0. Does this mean 2 f stops? And > for 56 mm it is 4.5 - 5.0, depending > > on the focusing distance. Does this mean 4 to 5 f stops? > > > Which EOS camera 'r you using? I have the same set of tubes and > I don't find any exposure problem with my 50E or 30 (ELAN 7E) for > 'normal' setups. I even > have the 25mm that is sold appart and few times I've used > 20+25+36 mm extension with good exposure results (composition is > something else :-) > > You may find troubles with E-TTL though. > > Underexposure could have been caused by a white/light subject > instead. At close ranges, there 18% average scene is just a fairy > tale. You have to take > subject tonality into account and compensate accordingly. > > Which lens where you using (just for the sake of curiosity)...? * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
